PROCESS FOR THE PRODUCTION OF HALOGENO-O-HYDROXYDIPHENYL COMPOUNDS.

摘要

A four step process for the production of halogeno-o-hydroxydiphenyl compounds in which, in the first step, a diphenyl compound is chlorinated; in a second step the chlorinated compound is acylated in a Friedel-Crafts reaction and optionally again chlorinated after the acylation; in a third step the acyl compound is oxidized; and in a fourth step the oxidized compound is hydrolyzed; according to the following reaction scheme: In the above scheme: R is unsubstituted C1-C8alkyl or C1-C8alkyl substituted by 1 to 3 halogen atoms or hydroxy; or unsubstituted C6-C12aryl or C6-C12aryl substituted by 1 to 3 halogen atoms, C1-C5alkyl or C1-C8alkoxy or combinations thereof; X is -O- or -CH2-; m is 1 to 3; and n is 1 or 2.